Air-pump.



PATENTED JULY 14, 190s.

Gr.- P. ABORN. l AIR PUMP. APPLIGATION FILED s1:1' T{14,19o7.

HHHI Il errar) s'rnrss GEORGE P. ABORN, or

Param;

Fic

STEAM PUMP woRKs, A CORPORATION OP samenwer.

AIR-PUMP.

Specification -of Letters Patent.

Application filed September 1.4, 1907. Serial No. 392,829.

speciication'and the accompanying drawings, forming a part of thesame.

This invention relates. to an improved pump of that class used for,pumping airor gases on the stroke in one direction, and

- liquid on the stroke in the op' iosite direction,-

the invention being especia y designed for '1 use in wet and dry vacuumpum s, although applicablefor other purposes.- n such Wet and dry vacuumpumps, as used on con# densers, connection ,is made with one part of thecondenser for removing the air and i uncondensed vapors, and with thebottom of the condenser for removing' the ldischarge water, and theseconnections communicate with opposite sides of the pump plunger,v if' asingle plunger be used, the air and uncondensed vapors thus beingdelivered from'one l side of the plunger, and the discharge water fromthevopposite side. Y In a pump embodying the present invention, the airinl'et is at the center of the cylinder by a central valveless suctionpassage, so that the air enters above the plunger when thelatter is 4atthebottom of its stroke, and the water enters by a similar passage Vinthe lower part of the cylinder when the plunger is raised, and flowsfrom said passage 'into a smaller cylinder below the air cylinder fromwhich 'the water is delivered on the downstroke of the plunger, thelarge air plunger having. a smaller extension or water plunger by W ichthe water ,is delivered. These pumps are preferably used in pairs withtheir plungers making' alternate strokes, as by cranks set at 180 apart,by which a higher speed is possible and a greater efficiency secured,but the broader features of the invention may be embodied in a singlepump, and may be used with driving mechanism of any type, as, forinstance, in crank and ily wheel' pumps, or direct actin r steam drivenpumps, andeither single., dup ex or triplex. l

The preferredl embodiment of the invention in a two cylinder crank andfly wheel pump is illustrated in the accom )anying drawingsl fcrming apart of this speci ication,

and this'lconstruction will now be described claims.

of a twin or two cylinder pump embodying all the features of theinvention; Fig. 2 is a pumps.

` Referring to the drawings, A, A, are two pumps, shown as operated bythe lcrank shaft B having cranks C set at 180o apart, so thattheplungers are timed to Imove in opposite directions.

.D is the main air inlet, and E the' mainv pipes 10, 11 to the. airand'water inlets d, eof

F at the bottom of each pump 1s shown as .connected by pipe 12 to theair delivery G at the topof the pump, H being an open vapor. pipeextending upward from the top of the pilpe 12, the construction shownbeing adaptve :for a pum i acting against a low ead, as

hereafter explained.

The air cylinder I, in which moves the large air plunger i, hasbelow-and continuous which moves the water plunger c forming an gersbeing carried b y the plunger rods 18 actuated from the motor and crankshaft. The air inlet d connects with thecylinder I cen,-

trally through the' suction valveless passage 14 extending about thecylinder and Open when the plunger 'L is-in its lowest iosition,andthewater inlet'e connects with t e space below thejplunger 'L .whenthe plunger'is raised, through suction valveless ias'sage'l at thebottom of the cylinderjhe water 15`ilows downward into the watercylinder K, when the plun'gers i, k are raised, so that thel lower endof the )lunger k is raised above the top of the cyliniler K, theplunger-then being guided. in the cylinder by the guide wings 1 on thebottom of the plunger. 'Ihe stroke through head de very valves 2 tp t eair'delivery G, a1d\tlie water is delivered from water c linder K andthe chamber 16 below it on t e down-strokeof thefjplunver,

a very small and compact` construction, in

Patented July 14, 190e, 'T

extension of the air plunger i, the two plunentering through suctionvalveless passage eryF.. l

- t will b seen that the mventlon provides BOSTON, MAssAoHUsmfrs.lAssicuon 'roV BLAKE a KNOWLES.-

in detail and the features forming the inven-gtion then specificallypointed out in the In the drawings :--Figure 1A 'is an elevation .i

vertical central section through one of the water inlet, which areconnected through the' respective pumps.l The water delivery with it thesmaller-water `cylinder K, in

-air Ais delivered from clvlinder, I on the u -f I. 1

through delivery valves 3 to the water de vbeing of :Great advantage insuch cas which t". e plunger winch disel'iarg'es the water may heproportioned for handling water only, thus assuring the filling of thewnter cylinder i uil securing a high elileieney, and 'whieh provides forlarge valve aree. for discharging the water, so that the pump may run ate high speed. The pump is also well adapted for discharging against seonsidersible head, which is frequently necessary in tln's class cipumps, the small. water plunger l) y reducing t..e surface against whichthe heed pressure is exerted. y

it the pump to deliver against eny corr siderable head, it will heunderstood that the air delivery G will not he connecte-,d to the waterdelivery F, but that the air and water deliveries will he entirelyseparate; With low heads, however, the connection of' the twodeliveries, as shown, Iis convement.

W ith two umps connected. as shown, and

with their p lingers tin'red for simultaneousA strokes in oppositedirections, the down stroke of one plunger i, alter the plungerk hasentered t e small cylinder K, acts to push the water from below theplunger i to the other pump cylinder, and thus aids in filling the lowerportion the other cylinder. A higher rotative speed is thus possible,and a greater efficiency secured.

While the invention is intended especially lfor wet and dry vacuum pumpsof that class in which air and weter are taken from the condenser byseparate connections, and the invention is illustrated as thus applied,and certain specific features of the invention are limited to such aconstruction, a single valve less suction passage may he `l ed throughwhich both the air and grate hier, the nir naturally rising andenteringl shove the air plunger and the water below the air plunger..ll/lith separate air and water colmections, also,"the admission ofwater to the cylinder K may' he controlled hy suction valves ol' ansuitable form, within the invention, considered broadly.

Other modifications may be made within the invention defined by theclaims.

'ldhat i. claim is l. A pump having a cylinder of two diem eters, theupper larger portion forming an nir cylinder and the lower smallerportion a water cylinder, u' )per and lower passages for admitting airan water to the air cylinder, a plunger in the'air cylinder acting3 toopen the air passage on its down stroke and the water passage on its upstroke for the admission of air and water, and to deliver air on .the upstroke, anda smaller plunger for delivering water from the watercylinder on the down stroke.

eener 2. A pump havinoA a rly'linder ol two dinineters, the upper largerportion formingl` .in air cylinder and the lower smells.' portion :iwater cylinder, connections lor :nlinitt iop; an' and water to the airwylinder. :i oluogrer in the air cylinder noting; to admit :wir on its.r on its up stroke, und

down stroke and w to deliver air on the up stroke, n. smaller plungerfor deliverine wa'er from the v. :iler cylinder on the down stroke, andIlrli\."-.ry valves and a delivery chnm'pcr surrounding.; the untercylinder.

3. 'The comliinstion olf 'wie pumps., meh pump having; a eylls'ldef.'ol" Lun dunner: s, the upper larp, fr portion formingt un :ur oy. nderand tl're lower snmller portion :t water cylinder, connections l'or:ulinittiuer :air und. water to the air cylinders and connecting thecylinders of the two punms, plunuers in llio air cylinders acting toadmit air on their don n stroke and water on their up stroke, und todeliver air on the up stroke, and smaller plu n gers for deliveringwater from the water cylinders on the down stroke, the plungors ol e thetwo pumps' being timed to move simultaneously in opposite directions.

' 4. A pump having a cylinder of two diameters, the upper larger portionforming an air cylinder, and the lower smaller portion a water c linder,suction connections including a valve ess suction air passage for theair cylinder, a plunger in the air cylinder :ietiner to admit air on itsdown stroke an d deliver nir on its up stroke, and a smaller plunger lorded livering water from the water cylinder on ils down stroke.

5. Apump having a cylinder ol' two diam eters, the u er larger portionformino,A :nl nii' cylinder and) the lower .smaller portion ny watercylinder, connections lor admitting.;` nir and water to the aircylinder7 a plunger in the air cylinder acting to admit air on its dou nstroke and water on its up stroke, und lo d liver an on the up stroke,und a snnsller plunger for delivering mater from tln` writer cylinder outhe down stroke. y v

5. The oomlnnation with the valvolosssnction, air cylinder l und watercylinder la. lice low the air cylinder. of plunggr-.r 'i lor theriircylinder, plunger /r for the water eylindcr on the bottom of plungerfi., cl'ininlnfr lll lwlmv the cylinder K, and delivery valvls for thoair and water cylinders.

ln testimony whereof, l have hereunto sot my hand, in the presence oftwo .suoscribiintrr witnesses.

GEORGE P. ABQRN.

Witnesses:

JOHN J. FINLEY, JULIUS MEYEns.

fl (l llll

